BSN Nitrix 2.0 is the latest advancement in concentrated nitric oxide precursor formulas, designed to support pumps, endurance and performance. The key to the all-new redesigned Nitrix 2.0 formula is the inclusion of 3 grams of the amino acid L-citrulline, a precursor to nitric oxide, setting Nitrix 2.0 apart and once again demonstrating BSN's relentless devotion to innovation and moving the world of supplementation forward.*